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ReflectionClassResource.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\Config\Resource;
013
014 use Symfony\Component\DependencyInjection\ServiceSubscriberInterface;
015 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
016
017 /**
018 * @author Nicolas Grekas <p@tchwork.com>
019 */
020 class ReflectionClassResource implements SelfCheckingResourceInterface, \Serializable
021 {
022 private $files = [];
023 private $className;
024 private $classReflector;
025 private $excludedVendors = [];
026 private $hash;
027
028 public function __construct(\ReflectionClass $classReflector, $excludedVendors = [])
029 {
030 $this->className = $classReflector->name;
031 $this->classReflector = $classReflector;
032 $this->excludedVendors = $excludedVendors;
033 }
034
035 public function isFresh($timestamp)
036 {
037 if (null === $this->hash) {
038 $this->hash = $this->computeHash();
039 $this->loadFiles($this->classReflector);
040 }
041
042 foreach ($this->files as $file => $v) {
043 if (false === $filemtime = @filemtime($file)) {
044 return false;
045 }
046
047 if ($filemtime > $timestamp) {
048 return $this->hash === $this->computeHash();
049 }
050 }
051
052 return true;
053 }
054
055 public function __toString()
056 {
057 return 'reflection.'.$this->className;
058 }
059
060 /**
061 * @internal
062 */
063 public function serialize()
064 {
065 if (null === $this->hash) {
066 $this->hash = $this->computeHash();
067 $this->loadFiles($this->classReflector);
068 }
069
070 return serialize([$this->files, $this->className, $this->hash]);
071 }
072
073 /**
074 * @internal
075 */
076 public function unserialize($serialized)
077 {
078 list($this->files, $this->className, $this->hash) = unserialize($serialized);
079 }
080
081 private function loadFiles(\ReflectionClass $class)
082 {
083 foreach ($class->getInterfaces() as $v) {
084 $this->loadFiles($v);
085 }
086 do {
087 $file = $class->getFileName();
088 if (false !== $file && file_exists($file)) {
089 foreach ($this->excludedVendors as $vendor) {
090 if (0 === strpos($file, $vendor) && false !== strpbrk(substr($file, \strlen($vendor), 1), '/'.\DIRECTORY_SEPARATOR)) {
091 $file = false;
092 break;
093 }
094 }
095 if ($file) {
096 $this->files[$file] = null;
097 }
098 }
099 foreach ($class->getTraits() as $v) {
100 $this->loadFiles($v);
101 }
102 } while ($class = $class->getParentClass());
103 }
104
105 private function computeHash()
106 {
107 if (null === $this->classReflector) {
108 try {
109 $this->classReflector = new \ReflectionClass($this->className);
110 } catch (\ReflectionException $e) {
111 // the class does not exist anymore
112 return false;
113 }
114 }
115 $hash = hash_init('md5');
116
117 foreach ($this->generateSignature($this->classReflector) as $info) {
118 hash_update($hash, $info);
119 }
120
121 return hash_final($hash);
122 }
123
124 private function generateSignature(\ReflectionClass $class)
125 {
126 yield $class->getDocComment();
127 yield (int) $class->isFinal();
128 yield (int) $class->isAbstract();
129
130 if ($class->isTrait()) {
131 yield print_r(class_uses($class->name), true);
132 } else {
133 yield print_r(class_parents($class->name), true);
134 yield print_r(class_implements($class->name), true);
135 yield print_r($class->getConstants(), true);
136 }
137
138 if (!$class->isInterface()) {
139 $defaults = $class->getDefaultProperties();
140
141 foreach ($class->getProperties(\ReflectionProperty::IS_PUBLIC | \ReflectionProperty::IS_PROTECTED) as $p) {
142 yield $p->getDocComment();
143 yield $p->isDefault() ? '<default>' : '';
144 yield $p->isPublic() ? 'public' : 'protected';
145 yield $p->isStatic() ? 'static' : '';
146 yield '$'.$p->name;
147 yield print_r(isset($defaults[$p->name]) && !\is_object($defaults[$p->name]) ? $defaults[$p->name] : null, true);
148 }
149 }
150
151 if (\defined('HHVM_VERSION')) {
152 foreach ($class->getMethods(\ReflectionMethod::IS_PUBLIC | \ReflectionMethod::IS_PROTECTED) as $m) {
153 // workaround HHVM bug with variadics, see https://github.com/facebook/hhvm/issues/5762
154 yield preg_replace('/^ @@.*/m', '', new ReflectionMethodHhvmWrapper($m->class, $m->name));
155 }
156 } else {
157 foreach ($class->getMethods(\ReflectionMethod::IS_PUBLIC | \ReflectionMethod::IS_PROTECTED) as $m) {
158 $defaults = [];
159 $parametersWithUndefinedConstants = [];
160 foreach ($m->getParameters() as $p) {
161 if (!$p->isDefaultValueAvailable()) {
162 $defaults[$p->name] = null;
163
164 continue;
165 }
166
167 if (!$p->isDefaultValueConstant() || \defined($p->getDefaultValueConstantName())) {
168 $defaults[$p->name] = $p->getDefaultValue();
169
170 continue;
171 }
172
173 $defaults[$p->name] = $p->getDefaultValueConstantName();
174 $parametersWithUndefinedConstants[$p->name] = true;
175 }
176
177 if (!$parametersWithUndefinedConstants) {
178 yield preg_replace('/^ @@.*/m', '', $m);
179 } else {
180 $t = \PHP_VERSION_ID >= 70000 ? $m->getReturnType() : '';
181 $stack = [
182 $m->getDocComment(),
183 $m->getName(),
184 $m->isAbstract(),
185 $m->isFinal(),
186 $m->isStatic(),
187 $m->isPublic(),
188 $m->isPrivate(),
189 $m->isProtected(),
190 $m->returnsReference(),
191 $t instanceof \ReflectionNamedType ? ((string) $t->allowsNull()).$t->getName() : (string) $t,
192 ];
193
194 foreach ($m->getParameters() as $p) {
195 if (!isset($parametersWithUndefinedConstants[$p->name])) {
196 $stack[] = (string) $p;
197 } else {
198 $t = \PHP_VERSION_ID >= 70000 ? $p->getType() : '';
199 $stack[] = $p->isOptional();
200 $stack[] = $t instanceof \ReflectionNamedType ? ((string) $t->allowsNull()).$t->getName() : (string) $t;
201 $stack[] = $p->isPassedByReference();
202 $stack[] = \PHP_VERSION_ID >= 50600 ? $p->isVariadic() : '';
203 $stack[] = $p->getName();
204 }
205 }
206
207 yield implode(',', $stack);
208 }
209
210 yield print_r($defaults, true);
211 }
212 }
213
214 if ($class->isAbstract() || $class->isInterface() || $class->isTrait()) {
215 return;
216 }
217
218 if (interface_exists(EventSubscriberInterface::class, false) && $class->isSubclassOf(EventSubscriberInterface::class)) {
219 yield EventSubscriberInterface::class;
220 yield print_r(\call_user_func([$class->name, 'getSubscribedEvents']), true);
221 }
222
223 if (interface_exists(ServiceSubscriberInterface::class, false) && $class->isSubclassOf(ServiceSubscriberInterface::class)) {
224 yield ServiceSubscriberInterface::class;
225 yield print_r(\call_user_func([$class->name, 'getSubscribedServices']), true);
226 }
227 }
228 }
229
230 /**
231 * @internal
232 */
233 class ReflectionMethodHhvmWrapper extends \ReflectionMethod
234 {
235 public function getParameters()
236 {
237 $params = [];
238
239 foreach (parent::getParameters() as $i => $p) {
240 $params[] = new ReflectionParameterHhvmWrapper([$this->class, $this->name], $i);
241 }
242
243 return $params;
244 }
245 }
246
247 /**
248 * @internal
249 */
250 class ReflectionParameterHhvmWrapper extends \ReflectionParameter
251 {
252 public function getDefaultValue()
253 {
254 return [$this->isVariadic(), $this->isDefaultValueAvailable() ? parent::getDefaultValue() : null];
255 }
256 }
257